Tunneling in perfect-fluid (minisuperspace) quantum cosmology

Quadratic quantum cosmology with Schutz’ perfect fluid

We study the classical and quantum models of a Friedmann-Robertson-Walker (FRW) cosmology coupled to a perfect fluid in the context of f(R) gravity. We use the Schutz’ variational formalism for the perfect fluid and show that it leads to a time parameter for the corresponding dynamical system. This formalism gives rise to a Schrödinger-Wheeler-DeWitt (SWD) equation for the quantum cosmology of ...

p-ADIC AND ADELIC MINISUPERSPACE QUANTUM COSMOLOGY

We consider formulation and some elaboration of p-adic and adelic quantum cosmology. Adelic generalization of the Hartle-Hawking proposal does not work in models with matter fields. p-Adic and adelic minisuperspace quantum cosmology is well defined as an ordinary application of p-adic and adelic quantum mechanics. It is illustrated by a few of minisuperspace cosmological models in one, two and ...

Symmetrized Gravitational Formulism in Perfect-fluid Cosmology

We investigate the model of magnetized cosmology, and simplify the exact solutions on the perfect-fluid. We show that large-scale magnetic components of cosmological fields have mathematical connection to the angular-momentum. In the general case where cosmologies are generalized by magnetic components, it introduces some mathematical solutions for gravitational fields in a manner similar to Di...

Tilt Classifications in Perfect Fluid Cosmology

Quantum tunneling effect in oscillating Friedmann cosmology.

It is shown that the tunneling effect in quantum cosmology is possible not only at the very beginning or the very end of the evolution, but also at the moment of maximum expansion of the universe. A positive curvature expanding Friedmann universe changes its state of evolution spontaneously and completely, without any changes in the matter content, avoiding recollapse, and falling into oscillat...